Search for a structural response to the intermediate phase in Gex Se1-x glasses

Moneeb T M Shatnawi; Christopher L. Farrow; Ping Chen; Punit Boolchand; Asel Sartbaeva; Michael Thorpe; Simon J L Billinge

doi:10.1103/PhysRevB.77.094134

Search for a structural response to the intermediate phase in Gex Se1-x glasses

Moneeb T M Shatnawi
, Christopher L. Farrow
, Ping Chen
, Punit Boolchand
, Asel Sartbaeva
, Michael Thorpe
, Simon J L Billinge

Research output: Contribution to journal › Article › peer-review

68 Scopus citations

Abstract

Atomic pair distribution functions (PDFs) obtained from high energy x-ray synchrotron radiation and x-ray absorption fine structure measurements were performed on 18 closely spaced compositions of chalcogenide glasses (Gex Se1-x with 0.15≤x≤0.40), which span the range of the floppy to rigid phase transition in these glasses. Structural parameters such as PDF peak widths, Debye-Waller factors from extended x-ray absorption fine structure, and the first sharp diffraction peak in S (Q) were extracted as a function of composition. These parameters smoothly evolve with composition, but there are no clear discontinuities or breaks in the slope associated with the appearance of the intermediate phase (IP). Therefore, these measurements do not confirm a structural origin for the IP.

Original language	English (US)
Article number	094134
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	77
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.77.094134
State	Published - Mar 26 2008

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.77.094134

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title = "Search for a structural response to the intermediate phase in Gex Se1-x glasses",

abstract = "Atomic pair distribution functions (PDFs) obtained from high energy x-ray synchrotron radiation and x-ray absorption fine structure measurements were performed on 18 closely spaced compositions of chalcogenide glasses (Gex Se1-x with 0.15≤x≤0.40), which span the range of the floppy to rigid phase transition in these glasses. Structural parameters such as PDF peak widths, Debye-Waller factors from extended x-ray absorption fine structure, and the first sharp diffraction peak in S (Q) were extracted as a function of composition. These parameters smoothly evolve with composition, but there are no clear discontinuities or breaks in the slope associated with the appearance of the intermediate phase (IP). Therefore, these measurements do not confirm a structural origin for the IP.",

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doi = "10.1103/PhysRevB.77.094134",

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T1 - Search for a structural response to the intermediate phase in Gex Se1-x glasses

AU - Shatnawi, Moneeb T M

AU - Farrow, Christopher L.

AU - Chen, Ping

AU - Boolchand, Punit

AU - Sartbaeva, Asel

AU - Thorpe, Michael

AU - Billinge, Simon J L

PY - 2008/3/26

Y1 - 2008/3/26

N2 - Atomic pair distribution functions (PDFs) obtained from high energy x-ray synchrotron radiation and x-ray absorption fine structure measurements were performed on 18 closely spaced compositions of chalcogenide glasses (Gex Se1-x with 0.15≤x≤0.40), which span the range of the floppy to rigid phase transition in these glasses. Structural parameters such as PDF peak widths, Debye-Waller factors from extended x-ray absorption fine structure, and the first sharp diffraction peak in S (Q) were extracted as a function of composition. These parameters smoothly evolve with composition, but there are no clear discontinuities or breaks in the slope associated with the appearance of the intermediate phase (IP). Therefore, these measurements do not confirm a structural origin for the IP.

AB - Atomic pair distribution functions (PDFs) obtained from high energy x-ray synchrotron radiation and x-ray absorption fine structure measurements were performed on 18 closely spaced compositions of chalcogenide glasses (Gex Se1-x with 0.15≤x≤0.40), which span the range of the floppy to rigid phase transition in these glasses. Structural parameters such as PDF peak widths, Debye-Waller factors from extended x-ray absorption fine structure, and the first sharp diffraction peak in S (Q) were extracted as a function of composition. These parameters smoothly evolve with composition, but there are no clear discontinuities or breaks in the slope associated with the appearance of the intermediate phase (IP). Therefore, these measurements do not confirm a structural origin for the IP.

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DO - 10.1103/PhysRevB.77.094134

M3 - Article

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JF - Physical Review B - Condensed Matter and Materials Physics

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Search for a structural response to the intermediate phase in Gex Se1-x glasses

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